Beet sugar foam is not a cosmetic problem. In the evaporator, it carries juice over with the vapour — and that is sugar you have already paid to extract.

Belgium's beet sugar processing runs through Tiense Suikerraffinaderij sites at Tienen, Wanze, Longchamps, Oostkamp and Merksem, and through Iscal Sugar's Fontenoy factory in Wallonia. At Longchamps, beet is processed into sugar sap and piped underground to Wanze for crystallisation — a reminder that the process is a connected train, not isolated units. In beet refining, foam appears at three points: defecation, evaporation, and the vacuum pans, and it is most persistent and most serious in evaporation, where entrainment carries juice over with the vapour and causes direct sugar loss [citation:4]. Innovacorp India manufactures and supplies antifoaming agents for beet sugar processing in Belgium, selected for this beet-specific foam behaviour.

Why Beet Foam Is Different from Cane Foam

Beet juice carries a different impurity profile from cane juice, and that changes how foam forms and how it breaks. The stabilising layer at the air-liquid interface is built from organic material in the juice, and in beet processing this layer can be persistent enough to survive normal process turbulence. A generic industrial defoamer selected on surface tension alone often underperforms, because foam rupture depends on the antifoam droplet entering and spreading at the interface — not simply on lowering surface tension [citation:7]. The selection step has to be done on your own juice, not from a catalogue.

Where Foam Hits the Beet Process

Foam is not uniform across the beet sugar train. The three stages that matter:

• Diffusion and liming: foam can build in the diffusion system and during defecation, where organic material is being dissolved and reacted. Polyalkylene glycol based antifoams are used at this stage, with doses typically in the 5–20 ppm range on the system [citation:5].
• Evaporation: this is the critical stage. Foam impairs heat transfer and carries juice over with the vapour, so the loss is both energy and product [citation:4]. The evaporation train in a beet plant runs in multiple effects, and foam load is not identical across them.
• Vacuum pans: foam-over in the pans disrupts crystallisation and can contaminate the crystal surface. Control here is about stability, not just knockdown.

Silicone or Non-Silicone: The Real Trade-Off

Both chemistries are used in beet sugar, and the choice is not about which is "better" in general — it is about which fits your process and your downstream constraints:

• Silicone antifoams are effective at low dose because silicone oil has a low surface tension, which helps the droplet enter and spread at the foam interface [citation:7]. The trade-off is residue: where crystallisation or buyer requirements are sensitive to silicone, a non-silicone route is preferred.
• Non-silicone antifoams, including polyalkylene glycol and fatty-acid based products, are widely used in beet diffusion and evaporation [citation:5]. They avoid the silicone residue question but may need a higher dose or a different feeding point to match the same knockdown performance.

The practical selection question is not "silicone or not" — it is "where in my train does the foam actually cost me money, and what does my downstream process allow me to leave behind."

Selection: What Determines the Right Grade

Three questions decide the grade:

• Which stage is the problem? Diffusion/liming, evaporation, or pans. Each has a different foam stabilisation mechanism and a different dose basis.
• What does downstream allow? If crystallisation or final product specifications are sensitive to silicone, the non-silicone route is the starting point. If not, silicone can give knockdown at lower dose.
• What is your feeding setup? Liquid grades suit metered dosing; the feeding point must be where the antifoam can disperse before the foam forms, not after it has already built.

Specification (TDS on Request)

Grade-specific values are confirmed on the TDS sheet. Before a trial, the parameters worth checking are active content, pH as supplied, density, appearance and storage conditions. These are shared on request and final specification is confirmed after a lab or plant trial on your own juice.

Dosage and Control

Dose is expressed in ppm on the process stream and set according to the stage and the foam load. Polyalkylene glycol antifoams for beet processing are typically dosed in the 5–20 ppm range, but the actual figure depends on your juice and your train configuration, so it is confirmed after a trial. Typical ranges for your stage are available as TDS on request.

Packing and Storage

Standard industrial packing; pack sizes on request. Store in closed packing away from incompatible materials, and follow the handling guidance on the TDS. Liquid grades should be protected from freezing where the formulation requires it.

Technical Support

We work with your process team on feeding point selection, dose setting and trial design — remote support, not an on-site field visit claim. The useful starting point is your process data: where the foam appears and what it is costing you.

Questions from Belgian Refinery Teams

Why does beet sugar processing foam more than cane processing?
Beet juice carries organic impurities and saponins that stabilise foam at the air-liquid interface. In beet refining, foam is most persistent during evaporation, where it impairs heat transfer and carries over juice by entrainment, causing sugar loss. The antifoam programme has to be selected for this beet-specific foam load, not for a generic industrial foam problem.

Where should antifoam be dosed in a beet sugar line?
Foam tends to appear at three points: defecation (liming), evaporation, and the vacuum pans. Evaporation is usually the most serious because entrainment losses are highest there. Dosing points are set according to where your plant sees the foam, with the dose expressed in ppm on juice. Typical ranges for your stage are available as TDS on request.

Are silicone and non-silicone antifoams both suitable for beet sugar?
Both chemistries are used in beet sugar processing, and the choice depends on the process stage and on downstream compatibility. Silicone antifoams are effective at low dose but can be problematic where residues affect crystallisation or where the buyer requires a non-silicone route. Polyalkylene glycol based products are widely used in beet diffusion and evaporation stages.

Which Belgian refineries does this antifoam apply to?
Belgium's beet sugar processing runs through Tiense Suikerraffinaderij sites at Tienen, Wanze, Longchamps, Oostkamp and Merksem, and through Iscal Sugar's Fontenoy factory in Wallonia. Juice composition and foam behaviour vary by site and by campaign, so the antifoam programme is set from your own process data rather than a single Belgium-wide dose.

To discuss a grade for your process stage, call +91-9312871070.